panic: deadlres_td_sleep_q: possible deadlock detected on RPI3

[bob prohaska]

I've created a bug report on the deadlock panic,
 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=243876

I wonder if it's related to 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=242732
The hardware and some symptoms are  different. Both RPI2 
and RPI3 display a "waiting for CAM" message, but I've not
seen my RPI2 panic yet.

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=243464
reports a freeze on RPI3 and attributes it to r356776.
I wonder of the freeze might have turned into a panic
given enough (~20 mins) time.

Thanks for reading,

bob prohaska